Warning! Mount Semeru Erupted Again This Morning (Monday, 4 May 2026)
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Mount Semeru in East Java erupted again on Monday (4/5/2026) at 06:31 WIB. Over the past week, Mount Semeru has erupted twice.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column reached approximately 800 meters above the crater peak (4476 meters above sea level).
The ash column appeared white to grey with thick intensity, drifting southwest. This eruption was recorded on seismographs with maximum amplitude 22 mm and duration of 150 seconds.
(Read: Number of Earthquake Disaster Victims in Indonesia 2020-2024)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru status remains at Level III (Alert). Seismic monitoring between 00:00-06:00 WIB on 4 May 2026 recorded 18 eruption earthquakes with amplitude 10-22 mm and duration 75-178 seconds.
Additionally, 2 local tectonic earthquakes (amplitude 5-7 mm, S-P 5.7-7.5 sec, duration 32-59 sec) and 1 distant tectonic earthquake (amplitude 10 mm, S-P 52 sec, duration 152 sec) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Outside this zone, public activity is also forbidden within 500 meters of river banks along Besuk Kobokan, as pyroclastic surges and lahar flows may reach up to 17 km from the crater.
During 2026 so far, MAGMA Indonesia has registered 1,778 volcanic eruptions nationwide, with Mount Semeru accounting for the highest total at 914 events.
(Read: Magnitude 4.1 Earthquake Strikes 2 Km East of Cartago, Costa Rica)
"Disclosure: This is an AI-generated translation of the original article. We strive for accuracy, but please note that automated translations may contain errors or slight inconsistencies."
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